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# SaveInfo

`public final class SaveInfo`
`extends Object` `implements Parcelable`

java.lang.Object
↳ | android.service.autofill.SaveInfo

Information used to indicate that an `AutofillService` is interested on saving the user-inputed data for future use, through a `AutofillService#onSaveRequest(SaveRequest, SaveCallback)` call.

A `SaveInfo` is always associated with a `FillResponse`, and it contains at least two pieces of information:

1. The type(s) of user data (like password or credit card info) that would be saved.
2. The minimum set of views (represented by their `AutofillId`) that need to be changed to trigger a save request.

Typically, the `SaveInfo` contains the same `id`s as the `Dataset`:

       new FillResponse.Builder()
           .addDataset(new Dataset.Builder()
               .setValue(id1, AutofillValue.forText("homer"), createPresentation("homer")) // username
               .setValue(id2, AutofillValue.forText("D'OH!"), createPresentation("password for homer")) // password
               .build())
           .setSaveInfo(new SaveInfo.Builder(
               SaveInfo.SAVE_DATA_TYPE_USERNAME | SaveInfo.SAVE_DATA_TYPE_PASSWORD,
               new AutofillId[] { id1, id2 }).build())
           .build();

The save type flags are used to display the appropriate strings in the autofill save UI. You can pass multiple values, but try to keep it short if possible. In the above example, just `SaveInfo.SAVE_DATA_TYPE_PASSWORD` would be enough.

There might be cases where the `AutofillService` knows how to fill the screen, but the user has no data for it. In that case, the `FillResponse` should contain just the `SaveInfo`, but no `Dataset`:

       new FillResponse.Builder()
           .setSaveInfo(new SaveInfo.Builder(SaveInfo.SAVE_DATA_TYPE_PASSWORD,
               new AutofillId[] { id1, id2 }).build())
           .build();

There might be cases where the user data in the `AutofillService` is enough to populate some fields but not all, and the service would still be interested on saving the other fields. In that case, the service could set the `SaveInfo.Builder#setOptionalIds(AutofillId[])` as well:

       new FillResponse.Builder()
           .addDataset(new Dataset.Builder()
               .setValue(id1, AutofillValue.forText("742 Evergreen Terrace"),
                   createPresentation("742 Evergreen Terrace")) // street
               .setValue(id2, AutofillValue.forText("Springfield"),
                   createPresentation("Springfield")) // city
               .build())
           .setSaveInfo(new SaveInfo.Builder(SaveInfo.SAVE_DATA_TYPE_ADDRESS,
               new AutofillId[] { id1, id2 }) // street and  city
               .setOptionalIds(new AutofillId[] { id3, id4 }) // state and zipcode
               .build())
           .build();

### Triggering a save request

The `AutofillService#onSaveRequest(SaveRequest, SaveCallback)` can be triggered after any of the following events:

- The `Activity` finishes.
- The app explicitly calls `AutofillManager#commit()`.
- All required views become invisible (if the `SaveInfo` was created with the `FLAG_SAVE_ON_ALL_VIEWS_INVISIBLE` flag).
- The user clicks a specific view (defined by `Builder#setTriggerId(AutofillId)`.

But it is only triggered when all conditions below are met:

- The `SaveInfo` associated with the `FillResponse` is not `null` neither has the `FLAG_DELAY_SAVE` flag.
- The `AutofillValue`s of all required views (as set by the `requiredIds` passed to the `SaveInfo.Builder` constructor are not empty.
- The `AutofillValue` of at least one view (be it required or optional) has changed (i.e., it's neither the same value passed in a `Dataset`, nor the initial value presented in the view).
- There is no `Dataset` in the last `FillResponse` that completely matches the screen state (i.e., all required and optional fields in the dataset have the same value as the fields in the screen).
- The user explicitly tapped the autofill save UI asking to save data for autofill.

### Customizing the autofill save UI

The service can also customize some aspects of the autofill save UI:

- Add a simple subtitle by calling `Builder#setDescription(CharSequence)`.
- Add a customized subtitle by calling `Builder#setCustomDescription(CustomDescription)`.
- Customize the button used to reject the save request by calling `Builder#setNegativeAction(int, IntentSender)`.
- Decide whether the UI should be shown based on the user input validation by calling `Builder#setValidator(Validator)`.

## Summary

### Nested classes
`class` | `SaveInfo.Builder` A builder for `SaveInfo` objects.

### Constants
`int` | `FLAG_DELAY_SAVE` Postpone the autofill save UI.
`int` | `FLAG_DONT_SAVE_ON_FINISH` By default, a save request is automatically triggered once the `Activity` finishes.
`int` | `FLAG_SAVE_ON_ALL_VIEWS_INVISIBLE` Usually, a save request is only automatically triggered once the `Activity` finishes.
`int` | `NEGATIVE_BUTTON_STYLE_CANCEL` Style for the negative button of the save UI to cancel the save operation.
`int` | `NEGATIVE_BUTTON_STYLE_NEVER` Style for the negative button of the save UI to never do the save operation.
`int` | `NEGATIVE_BUTTON_STYLE_REJECT` Style for the negative button of the save UI to reject the save operation.
`int` | `POSITIVE_BUTTON_STYLE_CONTINUE` Style for the positive button of save UI to have next action before the save operation.
`int` | `POSITIVE_BUTTON_STYLE_SAVE` Style for the positive button of save UI to request the save operation.
`int` | `SAVE_DATA_TYPE_ADDRESS` Type used on when the `FillResponse` represents a physical address (such as street, city, state, etc).
`int` | `SAVE_DATA_TYPE_CREDIT_CARD` Type used when the `FillResponse` represents a credit card.
`int` | `SAVE_DATA_TYPE_DEBIT_CARD` Type used when the `FillResponse` represents a debit card.
`int` | `SAVE_DATA_TYPE_EMAIL_ADDRESS` Type used when the `FillResponse` represents just an email address, without a password.
`int` | `SAVE_DATA_TYPE_GENERIC` Type used when the service can save the contents of a screen, but cannot describe what the content is for.
`int` | `SAVE_DATA_TYPE_GENERIC_CARD` Type used when the `FillResponse` represents a card that does not a specified card or cannot identify what the card is for.
`int` | `SAVE_DATA_TYPE_PASSWORD` Type used when the `FillResponse` represents user credentials that have a password.
`int` | `SAVE_DATA_TYPE_PAYMENT_CARD` Type used when the `FillResponse` represents a payment card except for credit and debit cards.
`int` | `SAVE_DATA_TYPE_USERNAME` Type used when the `FillResponse` represents just an username, without a password.

### Inherited constants
From interface `android.os.Parcelable`
`int` | `CONTENTS_FILE_DESCRIPTOR` Descriptor bit used with `describeContents()`: indicates that the Parcelable object's flattened representation includes a file descriptor.
`int` | `PARCELABLE_WRITE_RETURN_VALUE` Flag for use with `writeToParcel(Parcel, int)`: the object being written is a return value, that is the result of a function such as "`Parcelable someFunction()`", "`void someFunction(out Parcelable)`", or "`void someFunction(inout Parcelable)`".

### Fields
`public static final Creator<SaveInfo>` | `CREATOR`

### Public methods
`int` | `describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`String` | `toString()` Returns a string representation of the object.
`void` | `writeToParcel(Parcel parcel, int flags)` Flatten this object in to a Parcel.

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
From interface `android.os.Parcelable`
`abstract int` | `describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`abstract void` | `writeToParcel(Parcel dest, int flags)` Flatten this object in to a Parcel.

## Constants

### FLAG_DELAY_SAVE

    public static final int FLAG_DELAY_SAVE

Postpone the autofill save UI.

If flag is set, the autofill save UI is not triggered when the autofill context associated with the response associated with this `SaveInfo` is committed (with `AutofillManager#commit()`). Instead, the `FillContext` is delivered in future fill requests (with `AutofillService#onFillRequest(FillRequest, android.os.CancellationSignal, FillCallback)`) and save request (with `AutofillService#onSaveRequest(SaveRequest, SaveCallback)`) of an activity belonging to the same task.

This flag should be used when the service detects that the application uses multiple screens to implement an autofillable workflow (for example, one screen for the username field, another for password).

Constant Value: 4 (0x00000004)

### FLAG_DONT_SAVE_ON_FINISH

    public static final int FLAG_DONT_SAVE_ON_FINISH

By default, a save request is automatically triggered once the `Activity` finishes. If this flag is set, finishing the activity doesn't trigger a save request.

This flag is typically used in conjunction with `Builder#setTriggerId(AutofillId)`.

Constant Value: 2 (0x00000002)

### FLAG_SAVE_ON_ALL_VIEWS_INVISIBLE

    public static final int FLAG_SAVE_ON_ALL_VIEWS_INVISIBLE

Usually, a save request is only automatically triggered once the `Activity` finishes. If this flag is set, it is triggered once all saved views become invisible.

Constant Value: 1 (0x00000001)

### NEGATIVE_BUTTON_STYLE_CANCEL

    public static final int NEGATIVE_BUTTON_STYLE_CANCEL

Style for the negative button of the save UI to cancel the save operation. In this case, the user tapping the negative button signals that they would prefer to not save the filled content.

Constant Value: 0 (0x00000000)

### NEGATIVE_BUTTON_STYLE_NEVER

    public static final int NEGATIVE_BUTTON_STYLE_NEVER

Style for the negative button of the save UI to never do the save operation. This means that the user does not need to save any data on this activity or application. Once the user tapping the negative button, the service should never trigger the save UI again. In addition to this, must consider providing restore options for the user.

Constant Value: 2 (0x00000002)

### NEGATIVE_BUTTON_STYLE_REJECT

    public static final int NEGATIVE_BUTTON_STYLE_REJECT

Style for the negative button of the save UI to reject the save operation. This could be useful if the user needs to opt-in your service and the save prompt is an advertisement of the potential value you can add to the user. In this case, the user tapping the negative button sends a strong signal that the feature may not be useful and you may consider some backoff strategy.

Constant Value: 1 (0x00000001)

### POSITIVE_BUTTON_STYLE_CONTINUE

    public static final int POSITIVE_BUTTON_STYLE_CONTINUE

Style for the positive button of save UI to have next action before the save operation. This could be useful if the filled content contains sensitive personally identifiable information and then requires user confirmation or verification. In this case, the user tapping the positive button signals that they would complete the next required action to save the filled content.

Constant Value: 1 (0x00000001)

### POSITIVE_BUTTON_STYLE_SAVE

    public static final int POSITIVE_BUTTON_STYLE_SAVE

Style for the positive button of save UI to request the save operation. In this case, the user tapping the positive button signals that they agrees to save the filled content.

Constant Value: 0 (0x00000000)

### SAVE_DATA_TYPE_ADDRESS

    public static final int SAVE_DATA_TYPE_ADDRESS

Type used on when the `FillResponse` represents a physical address (such as street, city, state, etc).

Constant Value: 2 (0x00000002)

### SAVE_DATA_TYPE_CREDIT_CARD

    public static final int SAVE_DATA_TYPE_CREDIT_CARD

Type used when the `FillResponse` represents a credit card.

Constant Value: 4 (0x00000004)

### SAVE_DATA_TYPE_DEBIT_CARD

    public static final int SAVE_DATA_TYPE_DEBIT_CARD

Type used when the `FillResponse` represents a debit card.

Constant Value: 32 (0x00000020)

### SAVE_DATA_TYPE_EMAIL_ADDRESS

    public static final int SAVE_DATA_TYPE_EMAIL_ADDRESS

Type used when the `FillResponse` represents just an email address, without a password.

Constant Value: 16 (0x00000010)

### SAVE_DATA_TYPE_GENERIC

    public static final int SAVE_DATA_TYPE_GENERIC

Type used when the service can save the contents of a screen, but cannot describe what the content is for.

Constant Value: 0 (0x00000000)

### SAVE_DATA_TYPE_GENERIC_CARD

    public static final int SAVE_DATA_TYPE_GENERIC_CARD

Type used when the `FillResponse` represents a card that does not a specified card or cannot identify what the card is for.

Constant Value: 128 (0x00000080)

### SAVE_DATA_TYPE_PASSWORD

    public static final int SAVE_DATA_TYPE_PASSWORD

Type used when the `FillResponse` represents user credentials that have a password.

Constant Value: 1 (0x00000001)

### SAVE_DATA_TYPE_PAYMENT_CARD

    public static final int SAVE_DATA_TYPE_PAYMENT_CARD

Type used when the `FillResponse` represents a payment card except for credit and debit cards.

Constant Value: 64 (0x00000040)

### SAVE_DATA_TYPE_USERNAME

    public static final int SAVE_DATA_TYPE_USERNAME

Type used when the `FillResponse` represents just an username, without a password.

Constant Value: 8 (0x00000008)

## Fields

### CREATOR

    public static final Creator<SaveInfo> CREATOR

## Public methods

### describeContents

    public int describeContents ()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of `writeToParcel(android.os.Parcel, int)`, the return value of this method must include the `CONTENTS_FILE_DESCRIPTOR` bit.

Returns
`int` | a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either `0` or `CONTENTS_FILE_DESCRIPTOR`

### toString

    public String toString ()

Returns a string representation of the object. In general, the `toString` method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The `toString` method for class `Object` returns a string consisting of the name of the class of which the object is an instance, the at-sign character ``@`', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

>      getClass().getName() + '@' + Integer.toHexString(hashCode())

Returns
`String` | a string representation of the object.

### writeToParcel

    public void writeToParcel (Parcel parcel,
                    int flags)

Flatten this object in to a Parcel.

Parameters
`parcel` | `Parcel`: The Parcel in which the object should be written.
`flags` | `int`: Additional flags about how the object should be written. May be 0 or `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`. Value is either `0` or a combination of `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES

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